Eh4 And Magnetic Concealed Structure Analysis Of Zn Mining Area Of ​​the Old Central And Western Sinkholes

Gejiu is located in southeastern Yunnan, has a long history in the mining industry to the production of the famous and tin, with " Yunnan Tin" of good reputation." Yunnan Tin "good name. New China was founded, Mine of Gejiu has proven a tin, tungsten, copper, lead, zinc, silver, bismuth minerals more than 20 species, the total non-ferrous metal reserves of more than 800 milliontons.Malage,Longshujiao,Gaosong,Kafang in Gejiu Eastern, they bring about 90% of total reserves of Gejiu. However, long-term exploitation of mineral resources consumed in large quantities, the current stage has been to search for substitute resources. Gejiu Western with good prospects. Gejiu tin-polymetallic deposit with the concealed granite. To address the replacement of resources, select a representative Gejiu Western Luoshuidong buried mining.Collection of past geological data, geophysical data, combined with current research data, summarizes the geological, geophysical (magnetic, electrical) characteristics. Select high-precision magnetic measurement and EH4 buried structure of the survey area studies, carried out field data collection, completion of high-precision magnetic survey profiles 7, a total of 682 points, EH4 section 21, a total of 842 points. High-precision measurements of the magnetic data were changed to correct date, correct height, horizontal gradient correction, base correction and normal market correction, threshold in determining the terrain correction, component extraction, tangent method and the forward fitting. EH4 data on the direction of smooth coefficient x (0,0.3,0.5,1) extraction, y direction of smooth coefficient (0,0.3,0.5,1) extraction, probability and statistics, the calculation of abnormal limit, elevation correction and triangular Split treatment. On the high-precision magnetic measurement, EH4 data were qualitative and quantitative interpretation and integrated inference and interpretation.By exception analysis, research, inferred fault 10, a circular structure, buried granite one. To provide a structural basis for mining exploration.According to geological conditions and abnormal test results conclude, the establishment of mining structure resistivity anomaly, magnetic anomaly model. The model for future exploration and construction of old Western research has some significance.